Home / 118,931.60-164,133.20-78,574.56

Finding the Fourth Proportional to 118,931.60, 164,133.20 and 78,574.56

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Solution

The fourth proportional to 118,931.60, 164,133.20 and 78,574.56 is: 108,437.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,931.60 : 164,133.20 = 78,574.56 : x
  2. Step 2: Convert to fraction form
    118,931.60/164,133.20 = 78,574.56/x
  3. Step 3: Cross multiply
    118,931.60x = 164,133.20 × 78,574.56
  4. Step 4: Simplify right side
    118,931.60x = 12,896,693,971.39
  5. Step 5: Solve for x
    x = 12,896,693,971.39/118,931.60
  6. Step 6: Final answer
    x = 108,437.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.